“Build:
10/10
Sturdiest pair of headphones I have ever bought. You would be hard pressed to find a better build despite its mostly plastic parts. They may look cheap at a glance but in person they do not. Very well planned build.
Also for those who like high listening volumes you can expect them not to fry easily.
Comfort:
7.5/10
These do clamp decently but I actually...” --grizzlybeast

“
The GMP 400 is handbuilt in Germany and comes with a 3 year warranty. The GMP 400 is the open back cousin of the GMP 450, which has a closed back design.
The GMP 400's sound is very nicely balanced. Enough warmth to make them an enjoyable listen, with an incisive precision that allows you to really hear all the hidden detail in a good quality recording. I feel the...” --shaun_g

“
The GMP 450 is the closed back cousin of the GMP 400, which has an open back design.
The sound is very similar to the open back GMP 400, but with a little more bass response and narrower soundstage. Very impressive though for a closed back design.
Interestingly, I found that the GMP 450 requires a decent quality headphone amp (I had them hooked up to an Icon Audio...” --shaun_g

“It seems that the TV in the room next to mine is getting louder and louder.
Not wanting to be the grumpy old man, demanding all the time to lower the volume, I decided I need another closed headphone, preferably a higher ohm one, and none I tried so far.
In the past I had been eyeing the MB Quart QP 805 HS, but couldn't find enough information about their sound quality. After Headfi-er Pianist...” --Tiemen

The 8.000 Series headphone as a special version for demo units and info points in for instance Museums and many other locations. Acoustically this model is identical to the GMP-Series 8.000 except that this version has been adapted for POS (Point Of Sales) requirements. The ear pads are made of soft, 'gentle to the skin' foam and can be easily cleaned with normal household detergents....

German Maestro GMP 240 Acoustically open 100 Ohm headphones offer perfect sound reproduction with high dynamic response. Thanks to its transparency and linear frequency response the GMP 240 is ideal for all musical tastes. The cardamatic suspension and the velvet ear pads guarantee perfect fit and excellent comfort. For passionate listeners this is great value for the money.

The German Maestro GMP 435 S high performance headphone is based on the GMP 400 but equipped with low impedance and highly sensitive drivers for a very well balanced sound reproduction and impressive bass performance with highest efficiency, especially on portable devices like MP3 players. The cardamatic suspension and the specifically engineered ear pads guarantee perfect comfort and fit, also...